help with installing nec 3500 dvd writer

[gav_69]

hey just got a new nec 3500 dvd+ - writer today. I have dell 8300 so i took out the old nec 1100a and put in my new 3500 and hooked up all the cables, now i have cd rom aswell so i just replaced all the cables as there were before hand with the old 1100. just when i start my computer it keeps going into the bios and i go into drive configuration and it says unknown drive, and when i go into windows, there is no icon for it in my computer, can any one help me have no idea what to do